1973 Duster unladden weight?

Well, if all goes well ill be at DMV tomorrow, and im getting my paperwork in order, here in NY you need to list the UNLADEN weight, i bought the car in Jersey, which dosent list the weight on the title. The tag on the inside of the door is the gross weight right, its like 4500 lbs, does anyone know the unladen weight of a 73 Duster? Im sure i could put whatever, but id like to be sure and have it as close as possible so i dont have any problems, ive waited too long!